DoS攻击下的信息物理系统事件触发预测控制设计

针对信息物理系统(CPS)安全控制设计问题,提出拒绝服务(DoS)攻击下具有任意有界丢包的事件触发预测控制(ETPC)方法.首先,考虑DoS攻击能量的有限性及攻击行为的任意性,将DoS攻击描述为事件触发通信机制下的任意有界丢包;其次,在控制器端利用最近一次收到的状态信息进行控制器增益序列的预测设计以补偿DoS攻击造成的数据包丢失;随后,基于Lyapunov稳定性理论及切换系统分析方法考虑了DoS攻击下CPS的安全性并给出了控制序列设计方法.所提出的ETPC设计方法只需利用最近时刻收到的状态信息,无需满足传统CPS稳定性对最大允许丢包数的约束,为大时滞CPS的稳定性分析及控制提供了有效的解决方案.最后,通过仿真实例验证所提出的基于事件触发预测控制设计方法的有效性.

Event-triggered predictive control of cyber-physical systems under DoS attacks

This paper investigates security control design of cyber-physical systems(CPS) under denial of service (DoS) attacks. The event-triggered predicative control(ETPC) strategy is proposed to deal with arbitrary bounded packet dropout under DoS attacks for CPS. Firstly, arbitrary bounded packet dropout in the event-triggered communication scheme is employed to describe the effect of DoS attacks by considering its energy-constraint and arbitrariness. Then, a control gain sequence derived by the latest received state is predicted to compensate the packet dropouts caused by DoS attacks at the controller side. In what follows, the security analysis and ETPC design are conducted by using Lyapunov stability theory and the switch system method. The proposed ETPC method only needs the latest received state and dose not need to satisfy with the constraint of maximum allowable packets dropouts bound in traditional stability analysis methods, which provides an effective solution for the analysis and control of CPS with large time delay. Finally the simulation results show the effectiveness of the proposed ETPC method.